Mark M. answered 09/11/18
Tutor
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Retired Math prof with teaching and tutoring experience in trig.
Stretch vertically by a factor of 2: y = 2x2
Then, reflect across the x-axis: y = -2x2
Then, translate four units leftward: y = -2(x+4)2
Then, translate three units upward: y = -2(x+4)2 + 3